﻿// NClass - Free class diagram editor
// Copyright (C) 2006-2009 Balazs Tihanyi
// Copyright (C) 2020 Georgi Baychev

// This program is free software; you can redistribute it and/or modify it under 
// the terms of the GNU General Public License as published by the Free Software 
// Foundation; either version 3 of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful, but WITHOUT 
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with 
// this program; if not, write to the Free Software Foundation, Inc., 
// 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

using System;
using NClass.Translations;

namespace NClass.Core
{
    public sealed class CommentRelationship : Relationship
    {
        Comment comment;
        IEntity entity;

        /// <exception cref="ArgumentNullException">
        /// <paramref name="comment"/> is null.-or-
        /// <paramref name="entity"/> is null.
        /// </exception>
        internal CommentRelationship(Comment comment, IEntity entity)
        {
            this.comment = comment ?? throw new ArgumentNullException("comment");
            this.entity = entity ?? throw new ArgumentNullException("entity");
            Attach();
        }

        public override RelationshipType RelationshipType => RelationshipType.Comment;

        public override IEntity First
        {
            get => comment;
            protected set => comment = (Comment)value;
        }

        public override IEntity Second
        {
            get => entity;
            protected set => entity = value;
        }

        public CommentRelationship Clone(Comment comment, IEntity entity)
        {
            CommentRelationship relationship = new CommentRelationship(comment, entity);
            relationship.CopyFrom(this);
            return relationship;
        }

        public override string ToString()
        {
            return $"{Strings.Comment}: {comment.ToString()} --- {entity.Name}";
        }
    }
}
